stubborn

Refusing to change one's mind or course of action despite pressure to do so; unyielding or resolute. synonym: obstinate.

Characterized by a refusal to change one's mind or course of action; dogged or persistent.

Difficult to treat or deal with; resistant to treatment or effort.

To make stubborn; render stiff, unyielding, enduring, or the like.

Sturdy; stout; strong.